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Finding the Fourth Proportional to 8,458.75, 12,688.13 and 5,343.49

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Solution

The fourth proportional to 8,458.75, 12,688.13 and 5,343.49 is: 8,015.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,458.75 : 12,688.13 = 5,343.49 : x
  2. Step 2: Convert to fraction form
    8,458.75/12,688.13 = 5,343.49/x
  3. Step 3: Cross multiply
    8,458.75x = 12,688.13 × 5,343.49
  4. Step 4: Simplify right side
    8,458.75x = 67,798,895.77
  5. Step 5: Solve for x
    x = 67,798,895.77/8,458.75
  6. Step 6: Final answer
    x = 8,015.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.